Merge pull request #386 from codegangsta/psmit-hidden_command

Merging #180 @psmit hidden command impl

app.go

@@ -86,6 +86,8 @@ type App struct {
 	ErrWriter io.Writer
 	// Other custom info
 	Metadata map[string]interface{}
+
+	didSetup bool
 }
 
 // Tries to find out when this binary was compiled.
@@ -113,8 +115,16 @@ func NewApp() *App {
 	}
 }
 
-// Entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination
-func (a *App) Run(arguments []string) (err error) {
+// Setup runs initialization code to ensure all data structures are ready for
+// `Run` or inspection prior to `Run`.  It is internally called by `Run`, but
+// will return early if setup has already happened.
+func (a *App) Setup() {
+	if a.didSetup {
+		return
+	}
+
+	a.didSetup = true
+
 	if a.Author != "" || a.Email != "" {
 		a.Authors = append(a.Authors, Author{Name: a.Author, Email: a.Email})
 	}
@@ -150,6 +160,11 @@ func (a *App) Run(arguments []string) (err error) {
 	if !a.HideVersion {
 		a.appendFlag(VersionFlag)
 	}
+}
+
+// Entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination
+func (a *App) Run(arguments []string) (err error) {
+	a.Setup()
 
 	// parse flags
 	set := flagSet(a.Name, a.Flags)
@@ -359,11 +374,41 @@ func (a *App) Command(name string) *Command {
 	return nil
 }
 
-// Returnes the array containing all the categories with the commands they contain
+// Categories returns a slice containing all the categories with the commands they contain
 func (a *App) Categories() CommandCategories {
 	return a.categories
 }
 
+// VisibleCategories returns a slice of categories and commands that are
+// Hidden=false
+func (a *App) VisibleCategories() []*CommandCategory {
+	ret := []*CommandCategory{}
+	for _, category := range a.categories {
+		if visible := func() *CommandCategory {
+			for _, command := range category.Commands {
+				if !command.Hidden {
+					return category
+				}
+			}
+			return nil
+		}(); visible != nil {
+			ret = append(ret, visible)
+		}
+	}
+	return ret
+}
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (a *App) VisibleCommands() []Command {
+	ret := []Command{}
+	for _, command := range a.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
+
 // VisibleFlags returns a slice of the Flags with Hidden=false
 func (a *App) VisibleFlags() []Flag {
 	return visibleFlags(a.Flags)

app_test.go

@@ -304,6 +304,48 @@ func TestApp_CommandWithNoFlagBeforeTerminator(t *testing.T) {
 	expect(t, args[2], "notAFlagAtAll")
 }
 
+func TestApp_VisibleCommands(t *testing.T) {
+	app := NewApp()
+	app.Commands = []Command{
+		Command{
+			Name:     "frob",
+			HelpName: "foo frob",
+			Action:   func(_ *Context) error { return nil },
+		},
+		Command{
+			Name:     "frib",
+			HelpName: "foo frib",
+			Hidden:   true,
+			Action:   func(_ *Context) error { return nil },
+		},
+	}
+
+	app.Setup()
+	expected := []Command{
+		app.Commands[0],
+		app.Commands[2], // help
+	}
+	actual := app.VisibleCommands()
+	expect(t, len(expected), len(actual))
+	for i, actualCommand := range actual {
+		expectedCommand := expected[i]
+
+		if expectedCommand.Action != nil {
+			// comparing func addresses is OK!
+			expect(t, fmt.Sprintf("%p", expectedCommand.Action), fmt.Sprintf("%p", actualCommand.Action))
+		}
+
+		// nil out funcs, as they cannot be compared
+		// (https://github.com/golang/go/issues/8554)
+		expectedCommand.Action = nil
+		actualCommand.Action = nil
+
+		if !reflect.DeepEqual(expectedCommand, actualCommand) {
+			t.Errorf("expected\n%#v\n!=\n%#v", expectedCommand, actualCommand)
+		}
+	}
+}
+
 func TestApp_Float64Flag(t *testing.T) {
 	var meters float64
 
@@ -1129,6 +1171,109 @@ func TestApp_Run_Categories(t *testing.T) {
 	}
 }
 
+func TestApp_VisibleCategories(t *testing.T) {
+	app := NewApp()
+	app.Name = "visible-categories"
+	app.Commands = []Command{
+		Command{
+			Name:     "command1",
+			Category: "1",
+			HelpName: "foo command1",
+			Hidden:   true,
+		},
+		Command{
+			Name:     "command2",
+			Category: "2",
+			HelpName: "foo command2",
+		},
+		Command{
+			Name:     "command3",
+			Category: "3",
+			HelpName: "foo command3",
+		},
+	}
+
+	expected := []*CommandCategory{
+		&CommandCategory{
+			Name: "2",
+			Commands: []Command{
+				app.Commands[1],
+			},
+		},
+		&CommandCategory{
+			Name: "3",
+			Commands: []Command{
+				app.Commands[2],
+			},
+		},
+	}
+
+	app.Setup()
+	expect(t, expected, app.VisibleCategories())
+
+	app = NewApp()
+	app.Name = "visible-categories"
+	app.Commands = []Command{
+		Command{
+			Name:     "command1",
+			Category: "1",
+			HelpName: "foo command1",
+			Hidden:   true,
+		},
+		Command{
+			Name:     "command2",
+			Category: "2",
+			HelpName: "foo command2",
+			Hidden:   true,
+		},
+		Command{
+			Name:     "command3",
+			Category: "3",
+			HelpName: "foo command3",
+		},
+	}
+
+	expected = []*CommandCategory{
+		&CommandCategory{
+			Name: "3",
+			Commands: []Command{
+				app.Commands[2],
+			},
+		},
+	}
+
+	app.Setup()
+	expect(t, expected, app.VisibleCategories())
+
+	app = NewApp()
+	app.Name = "visible-categories"
+	app.Commands = []Command{
+		Command{
+			Name:     "command1",
+			Category: "1",
+			HelpName: "foo command1",
+			Hidden:   true,
+		},
+		Command{
+			Name:     "command2",
+			Category: "2",
+			HelpName: "foo command2",
+			Hidden:   true,
+		},
+		Command{
+			Name:     "command3",
+			Category: "3",
+			HelpName: "foo command3",
+			Hidden:   true,
+		},
+	}
+
+	expected = []*CommandCategory{}
+
+	app.Setup()
+	expect(t, expected, app.VisibleCategories())
+}
+
 func TestApp_Run_DoesNotOverwriteErrorFromBefore(t *testing.T) {
 	app := NewApp()
 	app.Action = func(c *Context) error { return nil }

category.go

@@ -28,3 +28,14 @@ func (c CommandCategories) AddCommand(category string, command Command) CommandC
 	}
 	return append(c, &CommandCategory{Name: category, Commands: []Command{command}})
 }
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (c *CommandCategory) VisibleCommands() []Command {
+	ret := []Command{}
+	for _, command := range c.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}

command.go

@@ -48,6 +48,8 @@ type Command struct {
 	SkipFlagParsing bool
 	// Boolean to hide built-in help command
 	HideHelp bool
+	// Boolean to hide this command from help or completion
+	Hidden bool
 
 	// Full name of command for help, defaults to full command name, including parent commands.
 	HelpName        string

errors_test.go

@@ -34,7 +34,7 @@ func TestHandleExitCoder_ExitCoder(t *testing.T) {
 
 	defer func() { OsExiter = os.Exit }()
 
-	HandleExitCoder(NewExitError("galactic perimiter breach", 9))
+	HandleExitCoder(NewExitError("galactic perimeter breach", 9))
 
 	expect(t, exitCode, 9)
 	expect(t, called, true)
@@ -51,7 +51,7 @@ func TestHandleExitCoder_MultiErrorWithExitCoder(t *testing.T) {
 
 	defer func() { OsExiter = os.Exit }()
 
-	exitErr := NewExitError("galactic perimiter breach", 9)
+	exitErr := NewExitError("galactic perimeter breach", 9)
 	err := NewMultiError(errors.New("wowsa"), errors.New("egad"), exitErr)
 	HandleExitCoder(err)
 

help.go

@@ -3,6 +3,7 @@ package cli
 import (
 	"fmt"
 	"io"
+	"os"
 	"strings"
 	"text/tabwriter"
 	"text/template"
@@ -21,15 +22,15 @@ VERSION:
    {{.Version}}
    {{end}}{{end}}{{if len .Authors}}
 AUTHOR(S):
-   {{range .Authors}}{{ . }}{{end}}
-   {{end}}{{if .Commands}}
-COMMANDS:{{range .Categories}}{{if .Name}}
-  {{.Name}}{{ ":" }}{{end}}{{range .Commands}}
-    {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
+   {{range .Authors}}{{.}}{{end}}
+   {{end}}{{if .VisibleCommands}}
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{end}}{{range .VisibleCommands}}
+     {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{"\t"}}{{.Usage}}{{end}}
 {{end}}{{end}}{{if .VisibleFlags}}
 GLOBAL OPTIONS:
    {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}{{if .Copyright }}
+   {{end}}{{end}}{{if .Copyright}}
 COPYRIGHT:
    {{.Copyright}}
    {{end}}
@@ -52,7 +53,7 @@ DESCRIPTION:
 
 OPTIONS:
    {{range .VisibleFlags}}{{.}}
-   {{end}}{{ end }}
+   {{end}}{{end}}
 `
 
 // The text template for the subcommand help topic.
@@ -64,9 +65,9 @@ var SubcommandHelpTemplate = `NAME:
 USAGE:
    {{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
 
-COMMANDS:{{range .Categories}}{{if .Name}}
-  {{.Name}}{{ ":" }}{{end}}{{range .Commands}}
-    {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{end}}{{range .VisibleCommands}}
+     {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{"\t"}}{{.Usage}}{{end}}
 {{end}}{{if .VisibleFlags}}
 OPTIONS:
    {{range .VisibleFlags}}{{.}}
@@ -120,6 +121,9 @@ func ShowAppHelp(c *Context) {
 // Prints the list of subcommands as the default app completion method
 func DefaultAppComplete(c *Context) {
 	for _, command := range c.App.Commands {
+		if command.Hidden {
+			continue
+		}
 		for _, name := range command.Names() {
 			fmt.Fprintln(c.App.Writer, name)
 		}
@@ -188,7 +192,10 @@ func printHelp(out io.Writer, templ string, data interface{}) {
 	err := t.Execute(w, data)
 	if err != nil {
 		// If the writer is closed, t.Execute will fail, and there's nothing
-		// we can do to recover. We could send this to ErrWriter if we need.
+		// we can do to recover.
+		if os.Getenv("CLI_TEMPLATE_ERROR_DEBUG") != "" {
+			fmt.Fprintf(ErrWriter, "CLI TEMPLATE ERROR: %#v\n", err)
+		}
 		return
 	}
 	w.Flush()

help_test.go

@@ -2,6 +2,7 @@ package cli
 
 import (
 	"bytes"
+	"strings"
 	"testing"
 )
 
@@ -110,3 +111,35 @@ func Test_Version_Custom_Flags(t *testing.T) {
 		t.Errorf("unexpected output: %s", output.String())
 	}
 }
+
+func TestShowAppHelp_HiddenCommand(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			Command{
+				Name: "frobbly",
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+			Command{
+				Name:   "secretfrob",
+				Hidden: true,
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"app", "--help"})
+
+	if strings.Contains(output.String(), "secretfrob") {
+		t.Errorf("expected output to exclude \"secretfrob\"; got: %q", output.String())
+	}
+
+	if !strings.Contains(output.String(), "frobbly") {
+		t.Errorf("expected output to include \"frobbly\"; got: %q", output.String())
+	}
+}